54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
package main
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import (
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"context"
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"fmt"
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"log"
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"math/rand"
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"net/http"
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"time"
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"github.com/go-chi/chi/v5"
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"go.opentelemetry.io/otel/trace"
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"toastielab.dev/toastie-stuff/otelchi"
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"toastielab.dev/toastie-stuff/otelchi/examples/multi-services/utils"
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)
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const (
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addr = ":8091"
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serviceName = "back-svc"
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)
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func main() {
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// init tracer provider
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tracer, err := utils.NewTracer(serviceName)
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if err != nil {
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log.Fatalf("unable to initialize tracer provider due: %v", err)
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}
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if err = utils.NewMeter(serviceName); err != nil {
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log.Fatalf("unable to initialize meter provider due: %v", err)
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}
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// define router
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r := chi.NewRouter()
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r.Use(otelchi.Middleware(serviceName, otelchi.WithChiRoutes(r)))
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r.Get("/", utils.HealthCheckHandler)
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r.Get("/name", func(w http.ResponseWriter, r *http.Request) {
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w.Write([]byte(generateName(r.Context(), tracer)))
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})
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log.Printf("back service is listening on %v", addr)
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err = http.ListenAndServe(addr, r)
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if err != nil {
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log.Fatalf("unable to execute server due: %v", err)
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}
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}
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func generateName(ctx context.Context, tracer trace.Tracer) string {
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_, span := tracer.Start(ctx, "generateName")
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defer span.End()
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rndNum := rand.New(rand.NewSource(time.Now().UnixNano())).Intn(100000)
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return fmt.Sprintf("user_%v", rndNum)
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}
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